发明名称 |
Field number conversion circuit |
摘要 |
In a field number conversion circuit, the mutual positions of the horizontal and vertical synchronizing signal pattern in a field of the television signal to be converted are measured by means of a measuring circuit (201) and these mutual positions are adequately transferred by means of a coupling circuit (203) to a corresponding field in the converted television signal. Reading the field memories (125, 127) used during the conversion operation is preferably effected at a clock frequency (at 53) which is not coupled to the clock frequency (at 23) used during the writing operation.
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申请公布号 |
US4587557(A) |
申请公布日期 |
1986.05.06 |
申请号 |
US19830534443 |
申请日期 |
1983.09.21 |
申请人 |
U.S. PHILIPS CORPORATION |
发明人 |
DOORNHEIN, LAURENS;RAVEN, JOHANNES G.;WELLES, PETRUS W. G.;ANNEGARN, MARCELLINUS J. J. C.;NILLESEN, ANTONIUS H. H. J. |
分类号 |
H04N7/01;(IPC1-7):H04N7/01 |
主分类号 |
H04N7/01 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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